Calculate column in DataGridView

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In this simple source code you will learn on how to calculate the column (for example Amount column) in a DataGridView control. I have similar tutorial on this about “How to Calculate Two Columns in DataGridView“ but it lacks a grand total on the Amount column.
Additionally the tutorial I have made before don’t have a sample source code so I decided to create one.

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Hi sir do you have example of datagridviewtextboxColumn autocomplete with two Columns or more than two.. i have already datagridviewtextboxColumn autocomplete but my problem is the autocomplete is One row i want to be a two rows or more than one..

Nicely written information is given in all articles. Thanks for superb efforts to assist novices like me.

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